<!DOCTYPE html>
<title>DOM Parts: Basic object structure, {{}} declarative API</title>
<meta name="author" href="mailto:masonf@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/domparts-utils.js"></script>

<div id=context_elements>
  <div></div>
  <div parseparts></div>
  <template></template>
  <template parseparts class=expect_success></template>
</div>

<script>
const kChildNodePartStartCommentData = "#";
const kChildNodePartEndCommentData = "/";
function assertIsComment(node, commentText) {
  assert_true(node instanceof Comment);
  // TODO(crbug.com/40271855): While developing alternative syntax, the comment might be empty or it might be "#" or "/".
  assert_true(node.textContent === '' || node.textContent === commentText);
}

const declarativeOpenerNoParseparts  = '<h1>';
const declarativeOpenerParseparts  = '<h1 parseparts>';
const declarativeContent  = '{{#}}First{{#}}<span {{}}>Middle</span>{{/}}Last{{/}}</h1>';

Array.from(document.querySelectorAll('#context_elements>*')).forEach(contextEl => {
  const expectParts = contextEl.classList.contains('expect_success');
  [false,true].forEach(addParsePartsInside => {
    const description = `${contextEl.outerHTML.split('><')[0]}><h1${addParsePartsInside ? " parseparts" : ""}>content...`;
    const content = (addParsePartsInside ? declarativeOpenerParseparts : declarativeOpenerNoParseparts) + declarativeContent;

    test((t) => {
      const root = contextEl.content ? contextEl.content.getPartRoot() : document.getPartRoot();
      assert_equals(root.getParts().length,0,'Should start with no parts');
      t.add_cleanup(() => {
        (contextEl.content || contextEl).replaceChildren();
        root.getParts().forEach(part => part.disconnect());
      });
      contextEl.innerHTML = content;
      if (expectParts) {
        let expectedRootParts = [{type:'ChildNodePart',metadata:[]}];
        assertEqualParts(root.getParts(),expectedRootParts,0,'declarative root missing parts');
        const childPart1 = root.getParts()[0];
        assertIsComment(childPart1.previousSibling,kChildNodePartStartCommentData);
        assertIsComment(childPart1.nextSibling,kChildNodePartEndCommentData);
        const expectedChild1Parts = [{type:'ChildNodePart',metadata:[]}];
        assertEqualParts(childPart1.getParts(),expectedChild1Parts,0,'First level childpart should just have one child part');
        const childPart2 = childPart1.getParts()[0];
        assertIsComment(childPart2.previousSibling,kChildNodePartStartCommentData);
        assertIsComment(childPart2.nextSibling,kChildNodePartEndCommentData);
        const expectedChild2Parts = [{type:'NodePart',metadata:[]}];
        assertEqualParts(childPart2.getParts(),expectedChild2Parts,0,'Second level childpart should have just the node part');
        assert_true(childPart2.getParts()[0].node instanceof HTMLSpanElement);
        assert_equals(childPart2.getParts()[0].node.textContent,'Middle');
      } else {
        assert_equals(root.getParts().length,0);
      }
    }, `Declarative DOM Parts innerHTML ${description} (expect${expectParts ? "" : " no"} parts)`);
  });
});

test((t) => {
  const tmpl = document.createElement('template');
  tmpl.parseparts = true;
  // See crbug.com/1490375.
  tmpl.innerHTML = '<div {{}}></div>';
  const root = tmpl.content.getPartRoot();
  t.add_cleanup(() => {
    tmpl.remove();
    root.getParts().forEach(part => part.disconnect());
  });
  assert_equals(root.getParts().length,1,'There should be one NodePart');
}, `Basic NodePart parsing`);


test((t) => {
  const tmpl = document.createElement('template');
  tmpl.parseparts = true;
  tmpl.innerHTML = ' <div id={{}} class={{}} foo=baz></div>';
  const root = tmpl.content.getPartRoot();
  t.add_cleanup(() => {
    tmpl.remove();
    root.getParts().forEach(part => part.disconnect());
  });
  assertEqualParts(root.getParts(),[{type:'AttributePart',metadata:[]},{type:'AttributePart',metadata:[]}],0,'Declarative AttributePart should be present');
  function checkBasics(checkContent,expectId,expectClass) {
    const innerDiv = checkContent.firstElementChild;
    assert_equals(innerDiv.localName,'div');
    assert_equals(innerDiv.getAttribute('id'),expectId || '','Declarative AttributeParts id attribute');
    assert_equals(innerDiv.getAttribute('class'),expectClass || '','Declarative AttributeParts class attribute');
    assert_equals(innerDiv.getAttribute('foo'),'baz','Declarative AttributeParts should not touch other attributes');
    return innerDiv;
  }
  checkBasics(tmpl.content);
  const clone = root.clone();
  const clonedDiv = checkBasics(clone.rootContainer);
}, `Basic AttributePart parsing with multiple attributes`);

</script>

